As you may have heard, Ekaterina Dulamova will work with the German rhythmic group in 2016. She has previously worked in Greece and I found this gala routine showing some of the girls she trained:

It would be very interesting to observe how the style of the German group will change with the new coach given that they have been a constant contender for the world's top 8.

Ekaterina Dulamova was born in 1979 in Plovdiv where she trained with coach Irina Cherneva. She became part of the Bulgarian national team in the mid 1990s. Good luck to the new coach and the German team!